Hone or abrading tool



Oct. 2, 1934. w. R. COOPER HONE OR ABRADING TOOL 2 Sheets-Sheet l Filed May 27. 1929 ZIJ ZZz'm Coo/ver ORNEY.

Oct. 2, 1934. .W R'COQPER 1,975,193

HONE 0R ABRADING TOOL Filed May 2?. 1929 2 sheets-sneer 2 '13mm Z ZZ Z/ c7161 Jia. 17d l 17 47d 7 .,AT RNEY.

Patented Oct. 2, 1934 UNITED STATES PATENT oFFlcE This invention relates to certain new and useful improvements in hones or abrading tool and has for its primary object to provide a device for truing the bearing openings in a piston in which is mounted the wrist or cross-head pin for the connectingrod of the piston, it being understood that the abrading or honing tool may be employed for finishing the walls of bearing openings or holes in various other arts and in differl0 ent connections.

Another object of the invention is to provide a hone or abrading tool to be d riven by a suitable source of power, such as being associated with an electric drillv motor and constructed in a manner to permit diameter adjustment to accommodate a standard sized tool for finishing openings or bearings of different diameters, it being furtherl understood that in addition to the diameter adjustment, certain parts of the tool are replaceable to permit a wider range of diameter adjustment.

With the above and other objects in view that will become apparent as the nature of the invention is better understood, the same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings:- e Figure 1 is a. side elevational view of a hone or abrading tool constructed in accordance with the present invention;

Figure 2 is a longitudinal sectional view;

Figure 3 is a longitudinal sectional view taken at right angles to Figure 2;

Figure 4 is a side elevational view of one of the movable jaws for varying the diameter of the tool;

Figure 5 is a front elevational view of the adjustable jaw shown in Figure 4;

Figure 6 is a perspective view of one of the side springs for retaining the emery cloth or sand paper in position on the tool;

Figure '7 is an exploded view showing in elevation and section the Aseveral parts comprising the tool;

Figure 8 is a cross-sectional view taken on line 8-8 of Figure 1 showing the edges of the abrading cloth or paper confined in a longitudinal slot in the tool shank; i "4' Figure 9 is a cross-sectional view taken on line 9-9 of Figure 1 showing the tensioned collar of the tool for retaining the adjacent ends of the jaws and springs in position;

Figure 10 is a cross-sectional view,

similar te Figure 8 showing a single strip. of abrading nieta with a wedge inserted in the shank slot for retaining the abrading cloth against slipping movement; and

Figures 11 and 12 show longitudinal sectional views of clamping jaws illustrating different dem grees of inclination on the innerfaces of the jaws to permit wider ranges of diameter adjustment.

The tool comprises a cylindrical shank 1 threaded as at 2 with the threaded end adapted for u attachment to an electric motor or other suitable source of power for rotating the same, the lower end of the cylindrical shank 1 being enlarged to form a shank body 2 rectangular in cross-section as shown in Figures 8 and 10 with tapering side 70 walls 3 merging into a lower threaded shank section 4. The shank body 2 is provided with a longitudinally extending slot 5 between the ta.- pered sides 3, this construction being clearly illustrated in Figure '1. 7

A nut 6 is threaded on the lower threaded shank section 4, the nut 6 carrying an annular integral collar '1 having a bore of greater diameter than the shank section 4 with the inner upper edge of the collar '1 outwardly beveled as so A pair of longitudinal jaws or shoes 9 is associated with the tapered sides 3 of the shank body 2, the jaws 9 being of identical construction and each comprising a channel bar having side u walls 10 overlapping and slidable upon the parallel sides of the shank body 2 as shown in Figure 8. The inner face 11 of the jaw 9 is inclined in a direction reverse to the inclination or taper of the side walls 3 Vof the shank body, the lower .o end portion of the inclined bottom wall 11 being longitudinally grooved as at 12 to provide clearance for the threaded shank end 4 when the jaw 9 is assembled on the shank. The lower ends of the side walls 10 of the jaw are -cut away as at 13 and the outer' face of the jaw below the cut away portion 13 tapers as at 14 to provide a lip engaged by the beveled edge 8 of the nut collar 7 as shown in Figure 3.

With the two jaws 9 assembled on opposite m0 sides of the shank body 2, the collar 15 is then mounted upon the upper threaded end 2 of the shank 1, the collar 15 carrying at its lower end an enlarged annular flange 16 received on the. upper ends of the jaws 9. The side walls 10 of m5 the jaws 9 carry upwardly directed ngers 17 having tapering outer sides 17a to be engaged by the inner tapered wall 16a of the annular flange 16, the opposed edges of the side walls 10 of the jaws when assembled on the shank body nu 'by the nut 6 threaded on tlfe 2 being spaced outwardly of the 'longitudinal slot 5 in the shank body.

The coil spring 18 is then placed on the upper threaded end 2 of the shank 1 with the lower end enclosing the collar 15 and engaging 'the shoulder 16h at the'upper side of the annular flange 16. The spring compressor nut 19 is threaded upon the upper end of the shank 1 for placing the spring 18 under compression and to force the collar 15 downwardly into binding engagement with the upper ends of the jaws 9, the lower ends of the jaws being hingedly supported lower sections 4 of the shank;

Strips of abrading clothor the like 2U inclose the outer sides of `the jaws 9 with the opposite edges thereof extended into the shank slot 5 as shown in Figure 8 and to retain the abrading strips 20 in position, a leaf spring 21l is positioned at each side of the shank to overlie the ope'n sides ofthe slot 5 with a finger extension 22 at each end confined by thenut collar 7 and .collar flange 16 as shown in Figure 2. The jaws 9 are retained in position by the spring pressedcollar 15', the tension of the spring determining thel rigidity of the jaws. The tool shank; as previously stated, is to be placed in communication with a suitable source of power. To procure 'diameter adjustment of thejaws 9, tension on the spring 18 is relieved by unscrewing'the nut 19 and .by screwing the nut A6 upon the threaded shank section 4, the jaws 9 are moved upwardly with their inclined inner faces 11 riding on the tapered faces 3 of the shank body 2 causing lateral separation of the jaws, and in this manner, relatively fine adjust' ments may be had and the perfect honing and abrading of a bearing opening accomplished.

In lieu of the two strips of abrading cloth Y20 illustrated in Figure 8, a single strip cf cloth;

may. be employed as shown in Figure' 10, the

abrading cloth having the end 20a passed through the slot 5 withthe end 20h lapped over one side wall 410,0f 'a jaw while the outer portion of the abrading strip encircles the two jaws as at 20cl means to prevent the abrading cloth from slipping around to the jaws during use of the tool, a wedge piece 22 i's inserted in the slot v9 as shown in Figure 10 'for-anchoring' the ilinei` end of theabrading cloth.

To obtain a wider range'of diameter adjustmeriti the jaws 9a and 9b shown in Figures 11A and 12 'may be substituted for the jaw 9 illustrated in thepreferred form of y the invention, the inner faceof the jaw 9a 'having a greater inclination as at 11a, it being understood that the jaw 9a is normally of increased width relative to the jaw 49, while the jaw' 9b shown in Figure-12 has 'its inner face. ata greaterinclination as at 11b,

` than'the inner face 11a Aof the jaw 9a, while the',

jaw 9b is of greater depth than the jaw 9a, these jaws 9a and 9b in .other respectsbein'g of the saine general construction as the jaw 9. The relative positions of the diii'erent .parts of the tool above described, are shown in Figures 1 and 3 'and from an inspection of said figures, together with the detail views shown in VFigure' '7,- it'is believed that theconstruction and operation as 'well as the method of .assembly of the tool 'parts will at once be understood.

may be made therein Without departing from the spirit and scope of the invention as claimed.

1. A lione or abrading tool comprising a shank, a pair of jaws detachably mounted on the shank, a rigidf support for one end of the jaws and tensioned retaining means 'for the other end of the jaws, abrading material inclosing the jaws, said shank and jaws being cooperatively constructed whereby longitudinal movement of the jaws effects diameter variations thereof, said shank being longitudinally slotted and the abrading material comprising sheets having their ends confined in the slot, and spring retainers for the abrading sheet overlying the shank slots and confined at their endsby the jaw support and fects diameter variations thereof, means for varying the tension of the'retaining means, said shank being longitudinally slotted and the abrading material comprising sheets having their ends i confined in the slot, and spring retainers for the abrading sheet overlying the shank slots and conned attheir ends by the jaw support and retainer,

3. A hone or abrading tool comprising a shank,

a pair of jaws detachably mountedV on the shank, a rigid support for one end of the jaws and ten. sioned retaining means for the other end of the jaws, abrading material inclosing the jaws, said shank and jaws being cooperatively constructed whereby longitudinal movement of the'jaws effects diameter variations thereof, said shank vbello ing longitudlnauy slotted and the ebradlng material comprising a sheet having one end extend-'- ing into the shank slot, a wedge inthe slot to re tainthe sheet end therein, the sheet inclosing the jaws, and means at each side of the slot for further anchoring the abrading sheet.

4. 'A hone or abrading tool comprising a shank threaded at opposite ends and having an intermediate shank body rectangular in cross section withtapered side walls, a pair of jaws adjustably mounted on the shank body and having inner in- `clined faces tapered reversel'y to. the tapered faces of theshank body,. a n'ut threaded on the lower end of the shank and having an enlarged annular collar confining the lower ends of the jaws, a

collar slidable on thel upper end of the shank llav- -ing an enlarged annular ange confining the thereof, an -abrading sheet anchored in the slot and .inclosing the jaws-and leaf spring engaged with the abrading sheet at opposite sides ofthe opposite sides lof Said shankand movable longi- ."tudinally thereof for expansion and contraction..

means to retain the shoes inoperative position, A

and an' abrading cloth one of its ends secured in said slot and being 'wrapped'.aro'und ata#r lat 'longitudinal slet therein opening at opposite sides shoes in a direction-opposite to the direction the tool is to be rotated. y

6. In a. hone or abrading tool comprising a .slotted shank, a pair of shoes carried on opposite Y '7. In a cutting toolhaving a central body with tapered faces, abrasive-supporting shoes internally tapered to t said tapered faces of the body, said shoes at corresponding ends being formed with internal grooves of sufcient size to conjointly embrace the central body portion to permit the shoesto more closely approach each other when moved in one direction on the tapered faces of the body, and means to adjust the shoes longitudinally on the central body portion.

' WILLIAM RALPH COOPER. 

